What are these plugs in my spare tire well?

tropikchiken · Post by **tropikchiken** » 09 Aug 2018, 18:10

Sorry if this is a stupid question... I couldn't find anything with Google, must be searching incorrectly.

I have two plugs in the back of my 2004 XC70, tucked under the cargo tray.
One is orange, another is red. What are they?

Here is a picture of them -

Are they related to towing? I want to get a tow hitch soon and thought I would need a wiring harness, but maybe I already have one...

Post by **oragex** » 09 Aug 2018, 18:29

Look like the ones on the radio amp, so I'd guess these are for the optional fadctory trunk subwoofer

Post by **Rattnalle** » 09 Aug 2018, 21:19

They're for the trailer module. Or at least one of them is.

The sub wire harness shouldn't be there without a sub I think.

Post by **abscate** » 09 Aug 2018, 21:58

Heater for the third rear seat. It’s very sought after. Lots of references to it here on MVS

Post by **kranz** » 10 Aug 2018, 00:10

This is the P2 trailer wiring harness and module. It plugs into a receptacle located on the rear cargo area fuse box.

Actually, now that I think about this a bit more... This harness is for 2005+ V70. I rummaged around in my parts bin and found a 4 wire trailer harness for earlier P2s someone improvised using a 3rd party lighting module. They tapped into the wiring of the "red" connector shown in the OP's photo. So presumably the red connector is for a trailer harness.

Post by **kranz** » 10 Aug 2018, 00:38

This is the P2 sub-woofer harness (well part of it anyway) and sub-woofer amp. It is my understanding that very few P2s are pre-wired for the sub woofer.

tropikchiken · Post by **tropikchiken** » 10 Aug 2018, 06:20

Wow thanks for all the info guys. So presumably, I should be able to plug a trailer right into the red plug? I've never connected trailers before so I am unfamiliar with what their plugs look like.

tropikchiken · Post by **tropikchiken** » 10 Aug 2018, 06:23

It looks like maybe this is the part I need to connect to the red and then to the trailer? https://www.ipdusa.com/products/6802/11 ... -converter

Post by **kranz** » 10 Aug 2018, 07:40

Should work. Its a genuine VOLVO part. eeuroparts site has a better photo of it that shows the other stuff that comes with it. Mounting bracket, zip ties, fasteners...

Post by **Rattnalle** » 10 Aug 2018, 07:49

Sounds about right but it looks very different from the euro version